[PATCH v1 0/4] target/riscv/kvm: QEMU support for KVM Guest Debug on RISC-V

[Chao Du <duchao@eswincomputing.com>]

This series implements QEMU KVM Guest Debug on RISC-V, with which we
could debug RISC-V KVM guest from the host side, using software
breakpoints.

This series is based on riscv-to-apply.next branch (v9.0.0) and is also
available at:
https://github.com/Du-Chao/qemu-alistair23/tree/riscv-to-apply.next.0524

The corresponding KVM side patches have been merged already:
https://lore.kernel.org/kvm/20240402062628.5425-1-duchao@eswincomputing.com/

A TODO list which will be added later:
1. HW breakpoints support
2. A 'corner case' in which the debug exception is not inserted by the
debugger, need to be re-injected to the guest.

Changes from RFC->v1:
- Rebased on riscv-to-apply.next
- use configs/ definition to conditionalize debug support

RFC link:
https://lore.kernel.org/qemu-riscv/20231221094923.7349-1-duchao@eswincomputing.com/

Chao Du (4):
  target/riscv/kvm: add software breakpoints support
  target/riscv/kvm: implement kvm_arch_update_guest_debug()
  target/riscv/kvm: handle the exit with debug reason
  target/riscv/kvm: define TARGET_KVM_HAVE_GUEST_DEBUG

 accel/kvm/kvm-all.c                 |   8 +--
 configs/targets/riscv64-softmmu.mak |   1 +
 include/sysemu/kvm.h                |   6 +-
 target/arm/kvm.c                    |   6 +-
 target/i386/kvm/kvm.c               |   6 +-
 target/mips/kvm.c                   |   6 +-
 target/ppc/kvm.c                    |   6 +-
 target/riscv/kvm/kvm-cpu.c          | 101 ++++++++++++++++++++++++++++
 target/s390x/kvm/kvm.c              |   6 +-
 9 files changed, 130 insertions(+), 16 deletions(-)

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2.17.1